: a calendar introduced in Rome in 46 b.c. establishing the 12-month year of 365 days with each fourth year having 366 days and the months each having 31 or 30 days except for February which has 28 or in leap years 29 days compare gregorian calendar
Examples of Julian calendar in a Sentence
Recent Examples on the Web
Another origin story says the date arose in 1582, when Pope Gregory XIII introduced the Gregorian calendar, leaving behind the Julian calendar that had been used since the era of Julius Caesar.
—
Paula Soria, AZCentral.com, 1 Apr. 2026
Orthodox Easter has a slightly later range of possible dates because the Eastern Orthodox Church uses the Julian calendar instead, USA TODAY reported.
—Caden Perry, jsonline.com, 30 Mar. 2026
Eastern Orthodox churches use the Julian calendar, which can place the date of Easter anywhere between April 4 and May 8 when it's converted back to the Gregorian calendar.
—Carlie Procell, USA Today, 29 Mar. 2026
Some dates differ for Eastern Orthodox churches, which follow the Julian calendar.
—Alex Perry, Cincinnati Enquirer, 18 Mar. 2026
The dates differ because most Christians use the Gregorian calendar, originally introduced in 1582, while the Eastern Orthodox Church uses the Julian calendar, introduced in 45 BC.
—Marina Johnson, Louisville Courier Journal, 22 Feb. 2026
The dates differ because most Christians use the Gregorian calendar, originally introduced in 1582, while the Eastern Orthodox Church uses the Julian calendar, introduced in 45 BC.
—Marina Johnson, IndyStar, 20 Feb. 2026
The foundations for representative government, the 365-day Julian calendar, modern sanitation, newspapers, roads and the postal system were established in Rome.
—Los Angeles Times, 6 Feb. 2026
At a church service to mark Russian Orthodox Christmas – observed on January 7 under the Julian calendar – Putin appeared with uniformed service members and their families, publicly showing resolve to continue his war on Ukraine, despite ongoing peace efforts.
—Nathan Hodge, CNN Money, 8 Jan. 2026
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Paula Soria, AZCentral.com, 1 Apr. 2026
Orthodox Easter has a slightly later range of possible dates because the Eastern Orthodox Church uses the Julian calendar instead, USA TODAY reported.
—Caden Perry, jsonline.com, 30 Mar. 2026
Eastern Orthodox churches use the Julian calendar, which can place the date of Easter anywhere between April 4 and May 8 when it's converted back to the Gregorian calendar.
—Carlie Procell, USA Today, 29 Mar. 2026
Some dates differ for Eastern Orthodox churches, which follow the Julian calendar.
—Alex Perry, Cincinnati Enquirer, 18 Mar. 2026
The dates differ because most Christians use the Gregorian calendar, originally introduced in 1582, while the Eastern Orthodox Church uses the Julian calendar, introduced in 45 BC.
—Marina Johnson, Louisville Courier Journal, 22 Feb. 2026
The dates differ because most Christians use the Gregorian calendar, originally introduced in 1582, while the Eastern Orthodox Church uses the Julian calendar, introduced in 45 BC.
—Marina Johnson, IndyStar, 20 Feb. 2026
The foundations for representative government, the 365-day Julian calendar, modern sanitation, newspapers, roads and the postal system were established in Rome.
—Los Angeles Times, 6 Feb. 2026
At a church service to mark Russian Orthodox Christmas – observed on January 7 under the Julian calendar – Putin appeared with uniformed service members and their families, publicly showing resolve to continue his war on Ukraine, despite ongoing peace efforts.
—Nathan Hodge, CNN Money, 8 Jan. 2026
Cite this Entry
“Julian calendar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Julian%20calendar. Accessed 2 Apr. 2026.
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Julian calendar
noun
Ju·lian calendar
ˌjül-yən- 
: a calendar introduced in Rome in 46 b.c. establishing the 12-month year of 365 days with each fourth year having 366 days and the months each having 31 or 30 days except for February which has 28 or in leap years 29 days compare gregorian calendar
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